Port Moresby Weather in May
During May, Port Moresby experiences very high daytime temperatures of 30°C (86°F) and cooler nights around 24°C (75°F). Expect quite a bit of rainfall. Around 105 mm (4.1 in) is typical.
Rainfall in Port Moresby in May
Analyzing past climate data, one can expect approximately 11 days of rain, averaging 105 mm (4.1 in). When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.
Temperature in Port Moresby in May
In May, Port Moresby sees very high temperatures, with highs of 30°C (86°F). Nights drop to around 24°C (75°F). Mornings and evenings are often more comfortable than the peak afternoon hours. With lows around 24°C (75°F), the nights are warm enough that a sheet is usually all you need for bedding.
Sunshine in Port Moresby in May
With approximately 212 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.
Average water temperature in May
At 28°C (82°F), the water is warm and comfortable for swimming. Most people find this temperature ideal for spending longer periods in the water.If your ideal day consists of dry skies and pleasant temperatures, July and August typically offer the best circumstances for Port Moresby.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Papua New Guinea, check out our Port Moresby's climate page.
Port Moresby Temperature in May
Min Temperature
24°C (75°F)
Max Temperature
30°C (86°F)
Water Temperature
28°C (82°F)
Chance of Rain
36%
Precipitation
105 mm (4.1 in)
Rainy days
11 days
Humidity
81%
Sunshine
212 hours
Percentage Sunshine
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Port Moresby typically stay consistent throughout May, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 24°C (75°F).
Average temperatures in May
Historical weather for Port Moresby in May
Browse day-by-day weather records for Port Moresby spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Port Moresby historical weather extremes in May
The extremes listed below come from historical weather data collected in Port Moresby from 2005 through 2025.
- The warmest day in May was on May 21, 2020, with a maximum of 39°C (102°F).
- The coldest May day was on May 11, 2015, with a maximum of 26°C (79°F).
- The lowest overnight temperature recorded in May was 20°C (68°F) (May 25, 2008).
Best Places in Papua New Guinea in May
Find out more about the weather in Papua New Guinea and which places have the best travel conditions in this month. See all of Papua New Guinea in May →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Port Moresby in May
Warm temperatures in May make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes. With water temperatures around 28°C (82°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Port Moresby in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Papua New Guinea, check out our Port Moresby's climate page.
Temperature Rainfall Sunshine Humidity Water Temp
See the full Port Moresby climate overview or explore weather in Papua New Guinea.
